Portable machine for reconditioning farm implement discs while on the implement structure



J. L. BRAD$TREET PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT June 2, 1959 DISCS WHILE ON THE IMPLEMENT STRUCTURE 4 Sheets-Sheet 1 Filed July 1, 1954 I INVENTOR. JOHN LBRADSTREET BY 772 %,,g %ATTQRNEY J1me 1959 J. BRADSTREET 2,888,344 PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT DISCS WHILE ON THE IMPLEMENT STRUCTURE Filed July 1, 1954 4 Sheets-Sheet 2 INVENTOR.

JOHN LBRADSTREET' BY Tron/V5 Y L. BRADSTREET 2,888,844-

CONDITIONING FARM IMPLEMENT June 2, 1959 J PORTABLE MACHINE FOR RE DISCS WHILE ON THE IMPLEMENT STRUCTURE 4 Sheets-Sheet 3 Filed July 1, 1954 M T R NE Y June 1959 -J. B'RADSTREET 2,888,844

PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT DISCS WHILE ON THE IMPLEMENT STRUCTURE Filed July 1, 1954' 4 Sheets-Sheet 4 INVENTOR. JOHN L. BRADS TREE T ATTORNEY PORTABLE MACHINE FOR RECONDITIONlNG FARM INIPLEMENT DISCS WHILE ON THE 11V- PLEMENT STRUCTURE John L. Bradstreet, Amy, Kans.

Application July 1, 1954, Serial No. 440,821

Claims. (Cl. 76-892) My invention relates to a portable disc rolling machine that may be taken to a piece of farm machinery having ground working discs thereon and the disc rolling machine may be moved along the row of several discs and be brought into engagement with the several discs, one at a time, for disc rolling or sharpening purposes.

In farm machines of the kind mentioned it has been found that for some reason some of the discs have been mounted off center, or in using the machine some of the discs have worn out of round, etc., and this makes it difficult to roll or sharpen the discs in as much as the job of rolling and sharpening the discs with my improved portable disc rolling machine is done without removing the discs from the farm machine. Therefore it is an object of my improved portable disc rolling machine to do the job of rolling and sharpening the discs and also compensate for the irregularities or off center mounting of the discs.

A further object of my invention is to provide a machine of the kind mentioned that is simple in construction, one that is easy to set up and use, one that is light in weight and therefore easy to handle as well as being inexpensive to build and buy. These and other objects of the invention will be more fully described as this description progresses.

Now referring to the accompanying drawings in which similar numerals of reference designate the same parts throughout the several figures of the drawings; Fig. 1 is a top plan view of the portable disc rolling device.

Fig. 2 is an enlarged detail sectional view through a part of the machine, the view being as seen from the line IIII in Fig. 1 and looking in the direction of the arrows.

Fig. 3 is a diagonal view of the machine, the view being as seen from the line III-1II in Fig. 1 and looking in the direction of the arrows.

Fig. 4 is a side view of a portion of the machine shown in Fig. 3, the view being as seen from the line IVIV in Fig. 3 and looking in the direction of the arrows.

Fig. 5 is a perspective view of the roll device employed in rolling the plow discs for sharpening purposes.

Fig. 6 is a perspective view of the transversely adjustable and intermediate carriage for the roll device shown in Fig. 5.

Fig. 7 is a perspective view of the primary carriage that carries the elements shown in Figures 5 and 6.

Fig. 8 is a view illustrating a hydraulic means for operating the disc roll bearing support elements. This device may be used instead of the bolt and nut means shown in Fig. 1.

In the drawings the portable disc rolling machine is shown as having a guide track T that is composed of two angle irons and 11 that are placed back to back so as to form a double thickness vertical track leg having a broad supporting base formed of the other two legs of the angle irons 10 and 11 which extend in opposite directions as is plainly shown in Figures 2, 3 and 4 and the ends of the angle irons 10 and 11 are supported on 2,888,844 Patented June 2, 9

plates 10a and 11a that may or may not be permanently attached, if desired, to the ends of the angle irons 10 and 11 by being welded thereto or by any other suitable means of attachment.

The device is further provided with a primary carriage frame F consisting of a pair of spaced apart and parallel frame elements 12 and 13 that are positioned angularly to the track elements 10 and 11 and one pair of their corresponding ends extend to and slightly above the track elements 10 and 11. The ends just mentioned, of the frame elements are provided with supporting flanged rollers 14 and 15, that bear on the vertical legs of the track element T and support the ends of the frame elements 12 and 13 above the track T.

The two frame elements 12 and 13 are connected by rear cross frame member 16, a front frame member 17 and an intermediate frame member 18. The rear end of the primary frame F is supported on a pair of parallely positioned wheels W and W which are also in parallelism with the track T.

The device is further provided with a turn table plate 19, having turned up sides 20 and 21 that are positioned one on opposite sides of the plate 19.

The turn table is revolvably mounted on the under structure by having a bolt 22 passed through the central portion thereof and also through a supporting frame member 23 that rests on the under structure frame members 13 and 17.

The device is further provided with a lever mount 24 that is carried on the frame element 13 and one end of a lever 25 is pivotally connected at 26 to the lever mount 24.

One end of an operating link 27 is pivotally connected to the lever 25 at the point 28 and the other end of the link 27 is loosely fitted in a hole at 29 in an attachment bracket 30 that is rigidly attached to turntable plate 19, so that by working the lever 25 back and forth the turntable may be turned a part of a revolution in either a clockwise or anticlockwise direction. I

The device is further provided with a tiltable support structure for the roll disc sharpening device. This supporting structure consists of a supporting plate 31 to which is rigidly (preferably welded) a half round bracket element 32 having plates 33 and 34 rigidly attached (preferably welded) a half round bracket element 32 having plates 33 and 34 rigidly attached (preferably welded) one to each end of the half round bracket element 32.

The lower ends of the plates 33 and 34 fit closely between the upturned edges 20 and 21 of the turn table plate 19 and pins 35 and 36 are passed, one through each plate 33 and 34 and their respective turntable leg 20 and 21 to form a pivotal mounting for the roll machine support platform 31.

The device is further provided with a tilting adjustment shaft 37 for the roll machine supporting plate 31. The lower end of the shaft 37 revolvably passes through a hole (not shown) in the turn table plate 19 and the lower end of the shaft 37 is provided with a nut and lock nut 38 and 39, that are threaded on the shaft 37 and bear against the underside of the turn table plate 19. The shaft 37 is provided with a shoulder 40 that revolvably bears on the upper side of the turn table plate 19. The shaft 37 extends upwardly past the tiltable roll machine supporting plate 31, and is provided with a collar 41 that is threaded thereon and is provided with an outwardly extending bolt 42 that is threaded thereinto and which slidably passes through one end of an actuating arm 43, the other end of which is rigidly attached (preferably welded) to the tiltable p1ate 31 at a point to one side of the pivot points 35 and 36 so that by turning the shaft 37 the collar 41 will move a up or down on the shaft 37 in accordance with the direction of the turning of the shaft, whereby the plate 31 accordingly is tilted in an up and down direction.

The device is further provided with a roll machine having pfowr driven rolls 44 and 45 thereon for engaging and rolling theplow discs for sharpening purposes as will later be described. i I

The roll machinehas a two sided case 46 and 47, the

lower edges of which are attached to a base plate 48 that isslidably carried in channel formations 49 and 50 that are positioned on opposite sides of the tiltable platform 31. The roll machine is movable in the channel formations 49 and 50 that are positioned, on opposite sides of the ti ltable platform 31. The roll machine is movable in the, channels 49 and 50 by means of a linkage 51 and 52 and 52 q,' o neend of which is pivotally attached at 53 to and between the roll case members 46 and 47. The rear ends of the links 52 and 521: are pivotally attached to pivotal mounting elements 54 and 55, that are rigidly mounted on andattached to the roll machine support plate 31. The end of the toggle link 52, at the pivotal connection6 betweenthe link 52 and 51 is provided with an upturned handle portion SZB c that is integrally formed on the link 52, so that by rocking the handle 52x the toggle links 1, 52 and 52a are actuated to advance or withdraw the roll machine as will later be described. The roll machine is provided with a pair of roll shafts 57 and 58 The shaft 57 being revolvably carried in bearings (not shown) in the housing element 47 and the haft 58 beingrevolvably carried in bearings formed in the case element 46, and on the forward ends of the shafts 7 and 58 is rigidly carried any suitable design of roll elements 44 and 45 one on each shaft.

The rear ends of the roll shaft 57 and 58 are provided with deep toothed gears 59 and 60, respectively, that are in mesh with each other so that one will drive the other. The upper edges of the case halves 46 and 47 are joinedtogetherbya bolt 61, on which is threaded a wing nut 62 which by turning the wing nut 62 will draw the upper edge of the two case halves 46 and 47 towards each other or permit their separation depending upon the direction of the turn of the wing nut 62 which in turn adjusts the roll elements 44 and 45, toward and away from each other as will readily be understood.

The device is further provided with a bell crank element 63 that is pivotally mounted at 64 between the forward end portions of the case elements 46 and 47, and on the lower end of the vertical leg of the case elements 46 ar 1 d 47, and on the lower end of the vertical leg of the bell crank 63 is revolvably mounted a roller 65 and the bell crank is actuated by a screw 66 that is threaded through a support leg 67 and bears against the horizontal leg of the bell crank 63 to swing the roller 65 forward in adjustable positions as a gauge for the depth thatthe plow disc may be allowed to extend between the an 45-.

The device is provided with a power unit, preferably a sn1all internal eombustion engine 68 that is carried on the prifnary frame element F having a rotatable drive shaft 69, on which is rigidly mounted a sprocket Wheel 71). I The device is further provided with a multiple speed transmission 71 having a driving shaft 72 on which is rigidly mounted a second sprocket wheel 73, and a chain 74 passes around and engages the sprocket wheels 70 and 73 for driving purposes.

The transmission has a driving tail shaft 75 on which rigidly mounted a longitudinal slip joint 76, and one end of a drive shaft 77 is slidably received in the slip joint 76, and a universal joint 78 connects the forward end of the drive shaft 77 and the rear end of the roll shaft 57. W

i In Fig. 8 is shown a substituteauid hydraulic operator devicefor the case elements 46 and 47. In Fig. 8 is shownfragnientary parts of the case elements 46 and 47 between which is positioned a helical compression spring d 79 to urge or cause separation of the case parts 46 and 47 upon the release of the means that draw them together as will later be described.

Rigidly mounted on the outer side of the case portion 47 is a hydraulic cylinder 80 in which is slidably positioned a piston 81 on which is rigidly carried a piston rod 82 that slidably passes through a cylinder head 83 that is rigidly mounted, preferably threaded, on the outer end of the cylinder 80. The cylinder head 83 is provided with an air escape hole 84 to permit easy working of the piston 81 in the cylinder 80.

One end of the shank of a hook element 85 is pivotally mounted at 86 on the upper portion of the case element 46, and the hook portion of the case element 46, and the hook portion 85:: of the shank 85 is hooked over and is in engagement with the outer end of the piston rod 82.

One end of a pipe line 86 is connected with and opens into the cylinder 89 at a point intermediate the rear cylinder head and the piston 81. The other end of the pipe line 86 is connected into a check valve 87 that will permit 21 flow of hydraulic liquid toward the cylinder 80 only. The check valve 87 is positioned intermediate a hydraulic pump 1? and the cylinder 80and receives the forced flow of hydraulic liquid from the pump P. The pump has the internal piston operated by the piston rod 83 the upper end of which is pivotally connected to the handle 89 which is pivotally attached at 90 to one end of a link element 91, the other end of which is pivotally attached at 92 to a supporting bracket 93 that is rigidly carried by the pump cylinder P.

The device is further provided with a hydraulic liquid supply tank 94 from which leads a pipe line 95 that connects with and opens into the pump cylinder P, and in the pipe line 9 5 is a check valve 96 that permits the flow of hydraulic liquid from the tank 94 to the pump P only.

The device is further provided with a by-pass pipe line 97, one end of which connects into the pipe line 86 at a point intermediate thecheck valve 87 and the hydraulic cylinder 80. The other end of the by-pass pipe line 97 connects into the hydraulic pipe line 95 at a point intermediate the tank 94 and the check valve 96. In the pipe line 97 is a manually operated valve 98 that may be turned to open or close the pipe line 97 against the flow of liquid through the pipe line 97in either direction.

Obviously the check valves 87 and 96 or their full equivalent may be built into the pump P as a part of the pump structure.

The frame elements 12 and 13 of the primary support ing frame structure F are each provided with a stub axle 99 and that extends outwardly from their respective frame elements 12 and 13 and are rigidly attached thereto. vIn preparing the machine for transport purposes or for loading and unloading the machine on and off a truck or the like for transport purposes, the wheels W may be removed from their present mountings and remounted on the stub axles 9951x1100 whereby the machine is substantially balanced thereon and is easy to move around and handle for such purposes as above mentioned,

Now to prepare the machine for use in sharpening a set of plow discs which have not been removed from the plow structure and in parallelism with the center axis of the series of discs indicated by the dotted lines 101. This having been done, the machine is set in position with the rollers 14 and 15 resting on the upper edges of the vertically positioned legs of the track T and behind the discs 101. The machine havingfb'een thus prepared is now ready for use to roll the discs 101 to a sha'rp edge.

To perform the rolling of the edges of the discs 101 to a sharp edge the engine 68 is started, whereupon the machine may be pushed by hand along the track T to its working position behind any sele'cted disc 101. This having been done the lever 25 may be rocked either forward or backward to partially revolve the intermediate carriage to such a position that the edge portion of the disc 101 that is to be sharpened may enter the throat or space between the rolls 44 and 45 so that the rolls 44 and 45 will bear substantially equally and alike, one on each side of the disc 101 when the rolls 44 and 45 are brought into engagement with the disc 101. This having been done the handle 37a and shaft 37 are turned to rock the platform 31 so that the center axes of the rolls 44 and 45 will substantially intersect the center axis of the string of discs 101.

This having been done, the lever 52x is rocked to move the rolls 44 and 45 inwardly toward the center axis of the discs 101 to a point where the edge of the disc 101, between the rolls 44 and 45 engages the gauge roller 65. The position of the gauge roller 65 may be adjusted toward or away from the center axis of the string of discs 101 by turning the handle 66 to rock the roll carriage 63 toward or away from the center axis of the string of discs 101, to gauge the point of roll contact on the disc 101 to suit the pleasure of the operator of the device.

This having been done the nut 62 is turned on the bolt 61 to draw the bearing supports 46 and 47 toward each other, whereupon the rolls 44 and 45 engage, one on each side of the disc positioned between the rolls with the desired pressure, as set up by the operator of the device, or, if the hydraulic operator device is' used instead of the manual operator, the pump handle 89 may be moved in a rocking motion, whereupon the pump shaft 88, moving a piston (not shown), in the pump P will force a liquid from the pump cylinder P into: the hydraulic cylinder 80 whereupon the piston 81 and the piston rod 82 is forced outwardly to move the hook element 85a85 to draw the two bearing supports 46-47 toward each other to perform the same service as described for the manually operated outfit.

This having been done, the gear shaft lever 71a may be rocked to throw the transmission 71 in gear, whereupon the rolls 44 and 45 are revolved, and they in turn revolve their engaged disc 101 and as this revolving motion continues the lever 52x is rocked to move the rolls 44 and 45 toward the edge of the discs 101 and as the rolls come to the edge of the disc, the edge of the disc is rolled to a sharp edge, which is the object of the machine and the final result required.

The disc having thus been sharpened, the bearing supports 46 and 47 are separated by the turning of the thumb nut 62, or if the hydraulic device is being used, the valve 98 may be opened and the springs 79 will separate the bearing supports 46 and 47 and the liquid in the hydraulic cylinder 80 will be forced through the bypass line 97 into the container 94, whereupon the slide 48 may be retracted by the rocking motion of the lever 52x to such a point that the rolls 44 and 45 are withdrawn clear of the disc 101 and the whole machine may then be pushed along the track T to the next or any other selected disc 101 whereupon the operation just described may be repeated. This operation may be continued until any part or all of the discs 101 have been sharpened.

The sharpening process having been completed as above described, the supporting wheels W and W and their supporting axles 99 and 100 are removed from the frame F and remounted thereon in the dotted positions 99a and 10011, whereupon the device may be removed from the track T and towed as a trailer or rolled onto a truck for transport purposes, and the track T may be loaded on top of the machine or loaded on a trailer for its transport purpose.

While the device as shown and described is probably the preferred form of the device, such modifications as lie within the scope of the appended claims may be employed without departing from the spirit and intention of the invention. Now having fully shown and described my invention, what I claim is:

1. In a disc sharpening machine of the kind described; the combination of a portable base element, a revolvable carriage, said revolvable carriage being revolva- 6. bly mounted on the said portable base element, and means for adjustably turning the revolvable carriage to adjusted positions and holding the revolvabale carriage in any selected adjusted position, a rockable carriage, said rockable carriage being rockably mounted on the said revolvable carriage, and means for rocking the rockable carriage to any selected rockable position and holding the rockable carriage in its selected adjustable position, a roll device for rolling discs to a sharp edge, said roll device having rolls thereon that are adjustable toward and away from each other for engagement of a disc entered between the rolls for sharpening purposes, said roll device being carried in slide guides that are carried on the rockable carriage, said roll device being movable longitudinally in said slide guides, and means for longitudinally moving the roll device into roll engagement position on a selected disc for disc sharpening purposes, and power means carried on the machine and connected with the roll device for driving the roll device for disc sharpening purposes, rollable elements, the base element of the foregoing defined structure being portably supported by said rollable elements, a depth gauge for determining the depth a disc may be entered between the said rolls, said depth gauge being positioned adjacent the said rolls and being engageable with the edge of a disk positioned between the rolls to limit the amount of the disc entered between the said rolls.

2. In a disc sharpening machine of the kind described; the combination of the structure, parts and arrangement thereof as defined in claim 1, said roll device having a pair of roll shafts, said ro-ll shafts being revolvably cartied in bearings, said bearings having means for forcibly moving the beaiings toward and away from each other, a pair of roll elements, said roll elements being rigidly mounted one on each of the said roll shafts and being engageable, each against the other, and means connecting the roll shafts for revolvably driving the shafts in synchroni-sm, and means connecting the power means and said shafts for rotatably driving the machine, said gauge means being a roller and said roller being adjustably movable toward and away from the outer ends of said rolls and means for holding said roller in any of its adjusted positions.

3. In a disc sharpening machine of the kind described; the combination of the structure, parts and arrangement thereof as defined in claim 1, said roll device having a pair of roll carrying shafts, said roll carrying shafts being revolvably carried in bearings, said bearings having means for forcibly moving the bearings toward and away from each other, a pair of roll elements, said roll elements being rigidly mounted one on each of the said roll shafts and being engatgeable, each against the other, and means connecting the roll shafts for revolvably driving the shafts in synchronism, and means connecting the power means and said shafts for rotatably driving the machine, said means for forcibly moving the shaft bearings being a bolt and nut thereon, the said bolt being carried by one of said bearings and slidably passing through :a portion of the second of said bearings, said nut being engageable against the second of said bearings for the forcible movement thereof, said gauge means being a roller, a bell crank, said roller being revolvably carried on one leg of the bell crank and means for rockably moving the bell crank to adjustably move the said roller toward and away from the outer ends of said rolls and means for holding the bell crank and roller in fixed adjusted positions.

4. In a disc sharpening machine of the kind described; the combination of the structure, parts and arrangement thereof as defined in claim 1, said combination being further characterized by said roll device having a pair of roll shafts, said roll shafts being revolvably carried in bearings, said bearings having means for forcibly moving the bearings toward and away from each other, a pair of roll elements, said roll elements being rigidly mounted one on each of the said roll shafts and being engageable each against thefother, and means connecting the roll shafts for revovably driving the shafts in synchronism, and means connecting the power means and said shafts for rotatably driving the machine, said means for forcibly moving said shaft bearings being a hydraulic cylinder, piston and piston rod operable therein, said cylinder being carried on one of the said bearings, one end of the said piston rod being connected to the second of said bearings for the forcible movement and holding of the bearings to and in adjusted positions, and means for forcing and holding a hydraulic pressure in said cylinder for actuating and holding the said piston and piston rod for similarly affecting the said roll shaft bearings, and means for controllably releasing the said hydraulic pressure.

5. A disc sharpening device of the kind described; said machine comprising in combination; a track means, said track means being placeable behind a gang of axially aligned discs of a disc plow, and in parallelism with the axis of the said gang of discs, asid disc sharpening device having :a portable portion, said portable portion being movable along said track means and guided in parallelism With the axis of said gang of discs by the track means, said portable portion having a base carriage, said base carriage having track engaging means thereon for guiding the movement of the portable portion as aforesaid, a rockable carriage, said rockable carriage being carried on the said base element and having means for rocking and holding the rockable carriage to and in adjustable positions on the base carriage, a roll machine, said roll machine being mounted on a revolvab'le carriage and means connecting between the revolvable carriage and the supporting portion of the machine therebeneath for revolving and holding the rotatable carriage in selected, adjustable positions and said roll machine having roll elements as a part thereof and the roll machine being transversely movable above the said carriage and relative to the said track means, and powermeans carried on the base carriage connected with the roll machine for driving the roll elements of the machine, and means for moving the roll machine into and out of engagement with any selected disc of the gang of discs for disc sharpening purposes, and Wheel means on the machine for carrying part of the machine independent of the said track, part of said wheel means being relocatable on the machine to render said machine portable for, transport purposes and independent of said track, said machine having an adjustable gauge means thereon for limiting the depth that a disc may be entered between the rolls of said machine.

References Cited in the file of this patent UNITED STATES PATENTS 2,487,709 Hodges Nov. s, 1949 2,498,951 Froese Feb. 28, 1950 2,510,601 Pater June6, 1950 2,573,501 Skromme Oct. 30, 1951 2,597,325 Hodges May 20, 1952 2,662,572 Goodell eta] Dec. 15, 1953 2,729,121 Robinson et a1. Jan. 3, 1956 

